[PATCH v1 03/11] perf unwind-libdw: missing <stdlib.h> in libdw_set_initial_registers()

[Ian Rogers]

Sashiko reported:

  When building the perf tool against strict C standard libraries
  (such as musl libc), compilation fails in
  tools/perf/util/unwind-libdw.c due to implicit declarations of
  memory allocation functions.

  The libdw_set_initial_registers() function dynamically allocates an
  array of DWARF registers using calloc() and subsequently releases it
  with free().  However, the source file lacks an explicit #include
  <stdlib.h>. On build environments where standard headers do not
  implicitly chain-include <stdlib.h>, these functions remain
  undeclared, resulting in fatal implicit function declaration errors
  that break the build.

Add the header files and use git clang-format to sort.

Reported-by: sashiko-bot@xxxxxxxxxx
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/util/unwind-libdw.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index ebea101e1001..714ff455f28b 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -1,24 +1,29 @@
 // SPDX-License-Identifier: GPL-2.0
+#include "unwind-libdw.h"
+
 #include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <stdlib.h>
+
 #include <linux/compiler.h>
+#include <linux/types.h>
+#include <linux/zalloc.h>
+
+#include <dwarf-regs.h>
 #include <elfutils/libdw.h>
 #include <elfutils/libdwfl.h>
-#include <inttypes.h>
-#include <errno.h>
+
+#include "callchain.h"
 #include "debug.h"
 #include "dso.h"
-#include <dwarf-regs.h>
-#include "unwind.h"
-#include "unwind-libdw.h"
+#include "event.h"
 #include "machine.h"
 #include "map.h"
+#include "perf_regs.h"
 #include "symbol.h"
 #include "thread.h"
-#include <linux/types.h>
-#include <linux/zalloc.h>
-#include "event.h"
-#include "perf_regs.h"
-#include "callchain.h"
+#include "unwind.h"
 #include "util/env.h"
 
 /*
-- 
2.55.0.1082.g2b9226bbc0-goog